Study of the motion of a floating toroidal body is of theoretical and practical impotance. From the theoretical point of view, torus represents one of the elementary non-simply connected shapes, and thus requires special treatment. From the practical point of view, this type of structure has been used as oceanographic buoy operating in harsh wave environment, whereas has been proposed as an open water column (OWC) wave energy converter and as buoyant element in toroidal semi-submersible designs. It is therefore evident, that the knowledge of the hydrodynamic properties of such body types represents an essential part in their design procedure. The paper deals with the linearized exciting wave forces and hydrodynamic coefficients of a toroidal body floating in water of finite depth. For the solution of the diffraction and the radiation problems the flow field around the body is subdivided into ring-shaped fluid regions, in each of which axisymmetric eigenfunction expansions for the velocity potential is made. By implementing Galerkin's method the various potential solutions are matched and numerical results concerning the exciting waves forces and the hydrodynamic coefficients in all modes of motion are obtained.
Hydrodynamic characteristics of floating toroidal bodies
Hydrodynamische Eigenschaften von schwimmenden Ringkörpern
Ocean Engineering ; 24 , 4 ; 381-399
1997
19 Seiten, 8 Bilder, 10 Quellen
Article (Journal)
English
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